AU651034B2 - Power converter for converting DC voltage into AC phase voltage having three levels of positive, zero and negative voltage - Google Patents

Power converter for converting DC voltage into AC phase voltage having three levels of positive, zero and negative voltage Download PDF

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Publication number
AU651034B2
AU651034B2 AU36913/93A AU3691393A AU651034B2 AU 651034 B2 AU651034 B2 AU 651034B2 AU 36913/93 A AU36913/93 A AU 36913/93A AU 3691393 A AU3691393 A AU 3691393A AU 651034 B2 AU651034 B2 AU 651034B2
Authority
AU
Australia
Prior art keywords
voltage
output
converter
fundamental wave
phase voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
AU36913/93A
Other languages
English (en)
Other versions
AU3691393A (en
Inventor
Kiyoshi Nakamura
Kiyoshi Nakata
Tokunosuke Tanamachi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Publication of AU3691393A publication Critical patent/AU3691393A/en
Application granted granted Critical
Publication of AU651034B2 publication Critical patent/AU651034B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/483—Converters with outputs that each can have more than two voltages levels
    • H02M7/487—Neutral point clamped inverters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L9/00—Electric propulsion with power supply external to the vehicle
    • B60L9/16—Electric propulsion with power supply external to the vehicle using ac induction motors
    • B60L9/18—Electric propulsion with power supply external to the vehicle using ac induction motors fed from dc supply lines
    • B60L9/22—Electric propulsion with power supply external to the vehicle using ac induction motors fed from dc supply lines polyphase motors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
    • H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
    • H02P27/14—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation with three or more levels of voltage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2210/00—Converter types
    • B60L2210/40—DC to AC converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Inverter Devices (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
AU36913/93A 1992-04-24 1993-04-14 Power converter for converting DC voltage into AC phase voltage having three levels of positive, zero and negative voltage Ceased AU651034B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10641392 1992-04-24
JP4-106413 1992-04-24

Publications (2)

Publication Number Publication Date
AU3691393A AU3691393A (en) 1993-11-11
AU651034B2 true AU651034B2 (en) 1994-07-07

Family

ID=14432988

Family Applications (1)

Application Number Title Priority Date Filing Date
AU36913/93A Ceased AU651034B2 (en) 1992-04-24 1993-04-14 Power converter for converting DC voltage into AC phase voltage having three levels of positive, zero and negative voltage

Country Status (7)

Country Link
US (1) US5361196A (ko)
EP (1) EP0571755B1 (ko)
KR (1) KR940006330A (ko)
CN (1) CN1028940C (ko)
AU (1) AU651034B2 (ko)
DE (1) DE69301061T2 (ko)
ZA (1) ZA932798B (ko)

Families Citing this family (82)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5517401A (en) * 1992-02-07 1996-05-14 Fuji Electric Co., Ltd. Three level pulse width modulated inverter for an electric vehicle
JP3178075B2 (ja) * 1992-04-23 2001-06-18 株式会社日立製作所 電力変換器の制御装置および電気車の制御装置
JP2814837B2 (ja) * 1992-06-04 1998-10-27 株式会社日立製作所 電力変換装置
JP2888104B2 (ja) * 1993-09-01 1999-05-10 株式会社日立製作所 電力変換装置
ZA949795B (en) * 1993-12-17 1995-08-18 Hitachi Ltd Electric power conversion equipment.
JP3153408B2 (ja) * 1994-03-10 2001-04-09 株式会社日立製作所 直列多重電力変換器
US5475581A (en) * 1994-06-10 1995-12-12 Westinghouse Electric Corp. Waveform flat-topping unit
US5592371A (en) * 1995-05-17 1997-01-07 General Motors Corporation DC link inverter
US5594634A (en) * 1995-05-17 1997-01-14 General Motors Corporation DC link inverter having soft-switched auxiliary devices
US5966296A (en) * 1996-06-27 1999-10-12 Eastman Kodak Company Bipolar-duty cycle controllable DC corona power supply
FR2753850B1 (fr) * 1996-09-24 1998-11-13 Convertisseur de puissance a commutation douce comprenant des moyens de correction de la tension mediane d'un diviseur de tension capacitif
US6058031A (en) * 1997-10-23 2000-05-02 General Electric Company Five level high power motor drive converter and control system
JP3383588B2 (ja) * 1998-08-04 2003-03-04 株式会社東芝 電力変換装置
EP1134878A1 (fr) * 2000-03-13 2001-09-19 Alstom Belgium S.A. Procédé et dispositif de réduction d'harmonique dans les convertisseurs de puissance
KR100393855B1 (ko) * 2000-07-29 2003-08-09 (주)우선제어 교류 전력변환 실습장치
JP2002218783A (ja) * 2001-01-15 2002-08-02 Rohm Co Ltd モータ駆動装置
JP3625429B2 (ja) * 2001-03-13 2005-03-02 株式会社東芝 電力変換器の制御装置
US6534949B2 (en) 2001-03-29 2003-03-18 General Electric Company Motor drive converter and method with neutral point drift compensation
JP3864307B2 (ja) * 2002-06-12 2006-12-27 株式会社安川電機 Ｐｗｍインバータ制御装置および制御方法
JP3951975B2 (ja) * 2003-07-22 2007-08-01 株式会社日立製作所 交流電動機の制御装置，交流電動機の制御方法及びモジュール
US6842354B1 (en) 2003-08-08 2005-01-11 Rockwell Automation Technologies, Inc. Capacitor charge balancing technique for a three-level PWM power converter
US6838925B1 (en) * 2003-10-07 2005-01-04 American Power Conversion Corporation Three level inverter
US7050311B2 (en) * 2003-11-25 2006-05-23 Electric Power Research Institute, Inc. Multilevel converter based intelligent universal transformer
US20070230226A1 (en) * 2003-11-25 2007-10-04 Jih-Sheng Lai Multilevel intelligent universal auto-transformer
US20070223258A1 (en) * 2003-11-25 2007-09-27 Jih-Sheng Lai Multilevel converters for intelligent high-voltage transformers
US6954366B2 (en) * 2003-11-25 2005-10-11 Electric Power Research Institute Multifunction hybrid intelligent universal transformer
US7177165B2 (en) * 2004-06-21 2007-02-13 Ballard Power Systems Corporation System and method for unbalanced independent AC phase voltage control of a 3-phase, 4-wire output DC/AC inverter
DE102004037918A1 (de) * 2004-08-05 2006-03-16 Robert Bosch Gmbh Verfahren zum leistungsgesteuerten Betreiben eines Elektromotors an einem Gleichspannungsnetz
FR2882475B1 (fr) * 2005-02-24 2007-04-13 Schneider Electric Ind Sas Dispositif et procede de commande d'un convertisseur et convertisseur electrique comportant un tel dispositif
US7495938B2 (en) * 2005-04-15 2009-02-24 Rockwell Automation Technologies, Inc. DC voltage balance control for three-level NPC power converters with even-order harmonic elimination scheme
US7339808B2 (en) * 2006-01-05 2008-03-04 Josette M. Alexander, legal representative Method and apparatus for DC to AC power generator
CN100571006C (zh) * 2006-05-16 2009-12-16 中国科学院电工研究所 超导储能用双向三电平软开关dc/dc变换器及其控制方法
JP2008060444A (ja) * 2006-09-01 2008-03-13 Seiko Epson Corp 集積回路装置
TWI346441B (en) * 2006-11-10 2011-08-01 Delta Electronics Inc Three-level ac generating circuit and control method thereof
EP1968186A1 (de) * 2007-03-07 2008-09-10 ABB Schweiz AG Verfahren zum Betrieb einer elektrischen Maschine
US7986535B2 (en) * 2007-07-17 2011-07-26 Raytheon Company Methods and apparatus for a cascade converter using series resonant cells with zero voltage switching
US7839023B2 (en) * 2007-07-18 2010-11-23 Raytheon Company Methods and apparatus for three-phase inverter with reduced energy storage
US8238130B2 (en) * 2008-09-30 2012-08-07 General Electric Company Low-mass, bi-directional DC-AC interface unit
US8044631B2 (en) * 2008-12-30 2011-10-25 Rockwell Automation Technologies, Inc. Power conversion systems and methods for controlling harmonic distortion
IT1393717B1 (it) * 2009-03-31 2012-05-08 Meta System Spa Dispositivo e metodo per la conversione di corrente continua in corrente alternata
CN101599713B (zh) * 2009-07-07 2011-09-14 华中科技大学 一种单相混合桥三电平逆变器
IT1396963B1 (it) * 2009-10-20 2012-12-20 Meta System Spa Sistema e metodo per la compensazione dello sbilanciamento delle tensioni in ingresso in inverter multilivello o simili
CN101931337B (zh) * 2010-09-09 2012-07-11 西安交通大学 一种光伏发电用斩波逆变电路及其控制方法
US8471514B2 (en) 2010-09-30 2013-06-25 Rockwell Automation Technologies, Inc. Adaptive harmonic reduction apparatus and methods
US8488345B2 (en) * 2010-12-01 2013-07-16 Rockwell Automation Technologies, Inc. Pulse width modulation control method and system for mitigating reflected wave effects in over-modulation region
KR101224589B1 (ko) * 2011-01-05 2013-01-22 경북대학교 산학협력단 멀티레벨 인버터
US8730691B2 (en) 2011-05-11 2014-05-20 Eaton Corporation Power conversion apparatus and methods employing variable-level inverters
CN102437770A (zh) * 2011-10-24 2012-05-02 阳光电源股份有限公司 一种单相半桥三电平逆变器
CN102427306A (zh) * 2011-10-24 2012-04-25 阳光电源股份有限公司 一种单相半桥三电平逆变器
US8619446B2 (en) 2012-04-27 2013-12-31 Rockwell Automation Technologies, Inc. Cascaded H-bridge (CHB) inverter level shift PWM with rotation
US8982593B2 (en) * 2012-04-27 2015-03-17 Rockwell Automation Technologies, Inc. Cascaded H-Bridge (CHB) inverter level shift PWM with rotation
KR101309290B1 (ko) 2012-05-10 2013-09-16 아주대학교산학협력단 불연속 펄스폭 변조 방식을 이용한 3-레벨 ｎｐｃ 인버터의 중성점 전압 제어 장치 및 그 방법
US9154049B2 (en) * 2012-05-10 2015-10-06 Toshiba Mitsubishi-Electric Industrial Systems Corporation Power conversion apparatus having a three-level converter that converts AC voltage to DC voltage having three levels
EP2672621B1 (en) * 2012-06-07 2019-01-23 ABB Research Ltd. Method for zero-sequence damping and voltage balancing in a three-level converter with split dc-link capacitors and virtually grounded LCL filter
US9225262B2 (en) 2012-06-29 2015-12-29 Eaton Corporation Multi-level inverter apparatus and methods using variable overcurrent response
US9007787B2 (en) 2012-08-13 2015-04-14 Rockwell Automation Technologies, Inc. Method and apparatus for bypassing Cascaded H-Bridge (CHB) power cells and power sub cell for multilevel inverter
US9425705B2 (en) 2012-08-13 2016-08-23 Rockwell Automation Technologies, Inc. Method and apparatus for bypassing cascaded H-bridge (CHB) power cells and power sub cell for multilevel inverter
CN102820848A (zh) * 2012-08-15 2012-12-12 欧瑞传动电气有限公司 Vdc电压自动调整方法及利用该方法的变频器
KR101412875B1 (ko) * 2012-10-04 2014-07-02 삼성전기주식회사 게이트 구동 회로 및 이를 갖는 인버터
US9362840B2 (en) * 2012-10-23 2016-06-07 Mitsubishi Electric Corporation Power conversion device
KR101462750B1 (ko) * 2013-01-16 2014-11-17 삼성전기주식회사 멀티 레벨 인버터
KR101524064B1 (ko) * 2013-01-17 2015-05-29 연세대학교 산학협력단 멀티-레벨 컨버터의 구동 장치 및 방법, 이를 이용한 멀티-레벨 컨버터 시스템
US9941813B2 (en) 2013-03-14 2018-04-10 Solaredge Technologies Ltd. High frequency multi-level inverter
US9240731B2 (en) 2013-03-18 2016-01-19 Rockwell Automation Technologies, Inc. Power cell bypass method and apparatus for multilevel inverter
US9083230B2 (en) 2013-06-20 2015-07-14 Rockwell Automation Technologies, Inc. Multilevel voltage source converters and systems
US9397584B2 (en) 2013-09-25 2016-07-19 Eaton Corporation Multi-level converter apparatus and methods using clamped node bias
CN104702252B (zh) * 2013-12-10 2018-10-12 通用电气公司 开关模组，变换器及电能变换装置
US9520800B2 (en) 2014-01-09 2016-12-13 Rockwell Automation Technologies, Inc. Multilevel converter systems and methods with reduced common mode voltage
US9325252B2 (en) 2014-01-13 2016-04-26 Rockwell Automation Technologies, Inc. Multilevel converter systems and sinusoidal pulse width modulation methods
KR101512188B1 (ko) * 2014-02-11 2015-04-22 한국전기연구원 모듈형 멀티레벨 컨버터의 구동방법 및 구동장치
US9318974B2 (en) 2014-03-26 2016-04-19 Solaredge Technologies Ltd. Multi-level inverter with flying capacitor topology
US10135237B2 (en) * 2014-07-30 2018-11-20 Abb Schweiz Ag Systems and methods for exploiting current capability in static ups
US9559541B2 (en) 2015-01-15 2017-01-31 Rockwell Automation Technologies, Inc. Modular multilevel converter and charging circuit therefor
US9748862B2 (en) 2015-05-13 2017-08-29 Rockwell Automation Technologies, Inc. Sparse matrix multilevel actively clamped power converter
US10075119B2 (en) * 2016-08-22 2018-09-11 Hamilton Sundstrand Corporation Three level inverter midpoint control gain correction
US9812990B1 (en) 2016-09-26 2017-11-07 Rockwell Automation Technologies, Inc. Spare on demand power cells for modular multilevel power converter
CN109905048B (zh) * 2017-12-08 2021-01-26 台达电子企业管理（上海）有限公司 三电平电路中点电压平衡控制方法
US10158299B1 (en) 2018-04-18 2018-12-18 Rockwell Automation Technologies, Inc. Common voltage reduction for active front end drives
CN112005482B (zh) * 2018-04-27 2023-12-12 东芝三菱电机产业系统株式会社 三电平电力变换装置、三电平电力变换装置的控制方法及存储介质
US11211879B2 (en) 2019-09-23 2021-12-28 Rockwell Automation Technologies, Inc. Capacitor size reduction and lifetime extension for cascaded H-bridge drives
US11444415B2 (en) 2019-09-30 2022-09-13 Eaton Intelligent Power Limited Uninterruptible power supplies with replaceable receptacle panels and related methods
US11342878B1 (en) 2021-04-09 2022-05-24 Rockwell Automation Technologies, Inc. Regenerative medium voltage drive (Cascaded H Bridge) with reduced number of sensors

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU581797B2 (en) * 1986-01-13 1989-03-02 Hitachi Limited A control apparatus for pulse width modulation inverters
AU636795B2 (en) * 1990-09-14 1993-05-06 Hitachi Limited Power converter

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE450317B (sv) * 1980-12-23 1987-06-15 Asea Ab Sjelvkommuterad vexelriktare
US4719559A (en) * 1986-10-22 1988-01-12 Cherry Semiconductor Corporation Current-mode control of capacitively coupled power converters
DE3907940A1 (de) * 1988-05-05 1989-11-16 Asea Brown Boveri Verfahren zur symmetrierung der spannungsaufteilung an stromrichtern mit mehrpunktschaltung
ATE82093T1 (de) * 1988-08-30 1992-11-15 Siemens Ag Verfahren zum betrieb eines dreipunktwechselrichters.
JP2566021B2 (ja) * 1989-11-22 1996-12-25 三菱電機株式会社 インバータ装置の運転方法
JP2526700B2 (ja) * 1990-04-11 1996-08-21 三菱電機株式会社 ３相３値レベルインバ―タ

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU581797B2 (en) * 1986-01-13 1989-03-02 Hitachi Limited A control apparatus for pulse width modulation inverters
AU636795B2 (en) * 1990-09-14 1993-05-06 Hitachi Limited Power converter

Also Published As

Publication number Publication date
US5361196A (en) 1994-11-01
AU3691393A (en) 1993-11-11
DE69301061T2 (de) 1996-08-08
CN1028940C (zh) 1995-06-14
KR940006330A (ko) 1994-03-23
DE69301061D1 (de) 1996-02-01
EP0571755A3 (en) 1994-07-20
ZA932798B (en) 1993-11-16
EP0571755A2 (en) 1993-12-01
CN1077825A (zh) 1993-10-27
EP0571755B1 (en) 1995-12-20

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